Is it safe to use tap water for coffee?

In this article, we’ll answer the query “Is it safe to use tap water for coffee”. We will show the necessary care with the water used to make coffee and discuss issues related to the topic.

Is it safe to use tap water for coffee?

Tap water should not be used, even if it is boiled and drinkable.

Although suitable for consumption, tap water has a large amount of chlorine and may contain impurities; this greatly modifies the flavor of the coffee to be consumed. The ideal is to use filtered or mineral water, as this way you can guarantee purity and cleanliness of the liquid. 

More than that, you are guaranteed that you will be enjoying your drink to its full potential.

If you’ve been a fan of specialty coffees for a while, you must already know how water influences the taste of your drink. It is, without a doubt, of paramount importance for a quality coffee. After all, we are talking about over 95% of our favorite drink!

This point, in fact, is crucial to ensure that the flavor of the coffee will not change.

Can tap water be contaminated?

Treating water and delivering a reliable, ready-to-use product is the responsibility of sanitation companies. There is no guarantee, however, that the water will continue to be suitable for consumption after passing through the pipes and remaining in the tank.

When in the box, we cannot know what kind of material the water will be exposed to. If the container is not clean or covered, for example, insects, birds and mice can enter. In general, the orientation is that the cleaning of the box happens every six months.

When contaminated, water can contain heavy metals, viruses and bacteria that are absorbed by food and taken to the human body, becoming a potent cause of disease and that can cause everything from diarrhea to cholera. To avoid this type of problem, it is necessary to intensify care at home or in the restaurant.

When the food is to be cooked, tap water can be used as, during the process, any contamination is eliminated. As for products consumed raw, such as juices, it is best to always use filtered water. With leaves and vegetables, the correct procedure is to wash item by item and then place in sanitizing material. 

For rinsing, the water in the filter is crucial so as not to re-contaminate a product that has just been cleaned.

Can tap water spoil the taste of coffee?

Water is a fundamental input for good coffee. It is not enough to have a quality bean, selected and roasted at the ideal point, generating a good ground coffee. The water that will be used to pass the coffee can change the taste of the drink, according to baristas. 

Sensorially the composition of the water alters its flavor. A ready-made coffee has more than 90% of its composition in water. It is very important for a quality coffee to have odorless, tasteless water. If you have water that tastes like it does in some cities, you lose the flavor of the coffee. 

Is the solution then to use mineral water? Most baristas recommend using good quality filtered water for brewing coffee. The problem with some mineral waters is their high content of bicarbonate in the chemical composition, which is why most are not so good for coffee. But, of course, between tap and mineral water, the best option is still the second option.

What is the ideal water temperature for coffee?

Anyone who thinks that the water has to be boiling when passing through the powder is slightly mistaken. The truth is, when water is at 100°C, its boiling point, it loses all of its oxygen. In this way, you will be burning your coffee powder, which undergoes changes in flavor and quality.

The water must be very hot indeed; however, the “right” point is between 92º and 96º C. This guarantees that all the substances and nuances of the coffee pass into the drink. A “cold” water would not allow the extraction of some compounds, resulting in an unbalanced drink.

If you don’t have a thermometer at home, a suggestion is to remove the water from the heat as soon as the first bubbles start to appear. Another alternative is to let the water boil and, when taking it off the heat, scald the paper filter and the containers in which the coffee will be stored. 

When this process is finished, the water temperature will be good to prepare the drink. Also, as a bonus, the coffee will not lose heat when being served.

Other FAQs about Water that you may be interested in.

What uses more water: dishwasher or sink?

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How to boil water without heat?

Can spring water be used in place of distilled water?


In this article, we answer the query “Is it safe to use tap water for coffee”. We show the necessary care with the water used to make coffee and discuss issues related to the topic.